Core-molding machine.



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JAMES M. PYOTT, JR., OF CHICAGO, ILLINOIS.

CORE-HOLDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 699,710, dated May 13, 1902.

Application filed January 11, 1902. Serial No. 89,303. (No model.)

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Beit known that I, JAMES M. Pvo'rr, Jr., a -citizen of the United States of America, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Core-Molding Machines, of which the following isaspecinication.

The main object of my invention is to provide an improved machine, simple in structure and operation, for rapidly molding cores rof uniform transverse section. I accomplish `this object by the device shown in the accompanying drawings, in which- Figure 1 is a top plan of a device constructled according to myinvention. Fig. 2 is a vertical longitudinal section along the center Fig. 3 is a section along the fline of Fig. 1. line 3 3 of Fig. 1. Fig. 4 is an end elevation of the plunger shown in Figs. 1 and 2. Fig. 5 is a side elevation of the same, partly broken away.

The device shown is constructed as follows: -A hopper 4. is rigidly securedto the upper side of the bed-plate 5. The hopper et consists of the Vertical end walls 6 and 7 and the iny the core which it is desired to make is rigidly secured to the wall 7, being horizontally disposed and extending through the wall 7 lonlgitudinally of the bed-plate 5. The inner end 11 of -the tube 10 is preferably cut away in the form shown, so that sand or other material held in the hopper 4 will be caused to enter the tube 10. The tube 1 0 is provided with a iiange 12, which is secured to the end wall 7 by means of the bolts 13. The bolts 13 are preferably seated in slots in the iiange 12, as shown in Fig. 3, so that the tube may be released from the hopper Il by simply loosening the nuts 14 and slightly turning the tube 10 on its axis before withdrawing same toward the left of Figs. 1 and 2.

The machine is provided with tubes of various diameters, which may be substituted for the tube 10 to make cores of corresponding diameters. Each of said tubes has thereon a flange similar to the flange 12 and having a pair of slots adapted to receive the bolts The plunger 15 is also removable and may be replaced by a plunger corresponding in cross-section to the tube that is used. The plunger' 15, loosely fitting the interior of the blade 10, is connected to an extended shank 16. A part 17 of the shank 16 is preferably made integral with the plunger 15 and is connected to the remainder of the shank 16 by the coupling 18 at a considerable distance from the plunger 15. The object of this feature is to bring the coupling 18 at such a point suiiiciently far from the plunger 15 that a core of less diameter than the main part of the shank 16 can be made without danger of interference between the coupling 18 and the end 11 of the tube 10. The face 19 of the plunger 15 is preferably made sloping downwardly, as shown, so that the core material entering the tube 10 at the end 11 will be forced upwardly and prevent the formation of cavities in the core at the upper part of the tube while the material is being forced into said tube. The shank 16 is mounted in the guides 20, within which it is slidable longitudinally of the tube 10. Y Collars 21, .adjustable along the shank 16, are provided to limit .the movement of said shank. A member 22 is secured to the shank 16 by means of the set-screw 23, being th us adjustable along said shank. A bracket 24 is rigidly secured to the bed-plate .5 and has pivoted thereto at 25 the lever 26. The lever 26 is secured to the member 22 by the means of the screw 27, which is seated in a slot 28 in said lever. The shank 16 is hollow and the plunger 15 is provided with a central longitudinal aperture 28. A rod 29 extends longitudinally through the shank 16 and the plunger 15 and is rigidly secured to the bracket 30 of the supporting-frame by means of the set-screw 31. The rod 29 extends into the tube 10 for a considerable distance and terminates inside of said tube, as shown in Fig. 2. provided with apertures 32, which extend longitudinally through said plunger.l A stop 33 is secured to the bed-plate 5 and is hinged at 34:, so that it may be turned to one side when desired. t l

The operation of the device shown is as follows: Sand or other material of suitable composition for the formation of cores is thrown into the hopper 4. By working the handle 26 backward and `forward the plunger 15 The plunger 15 is furtherv IOO rams such of the sand which enters the end 11 of the tube 10 tightly into said tube and around the rod 29, whereby a core having a vent in same is formed. The inclined surface 19 at the same time forces the sand up- Wardly and causes same to fill all parts of the interior of the tube 10. The core is caused to move through the tube 10, leaving same at the end 35, where it may be received and cut to the desired length upon a tray resting on the bed-plate 5 near the end 35 of the tube 10. The tray is not shown in 'the drawings. If it is desired to strengthen the core by the insertion of Wires extending longitudinally through same, said wires may be inserted through the holes 32 of the plunger l5. The iirst movement of the plunger 15 causes the sand to tightly pack around said Wires, and the friction of the sand against said Wires causes them to be drawn through the tube l0 with the core. The stiffening-wires may also be inserted by holding same against the stop 33, so that their opposite ends enter the tube 10, and then causing the core to slide outwardly along such Wires.

Cores of various sizes may be made by securing a tube of suitable size to the end 7 of the hopper 4L and attaching a corresponding plunger to the shank 16.

It will be seen that numerous details of the device shown may be altered without departs ing from the spirit of my invention. I there- .fore do not confine myself to such details, except as hereinafter limited in the claims.

What I claim as my invention, and desire to secure by Letters Patent, is

l. A core-molding machine, comprising a frame, a tube secured to said frame and open at its ends, a rod extending longitudinally within said tube, means for supplying core material to said tube, and a plunger longitudinally slidable within said tube and along said rod and adapted to force said material through said tube, said plunger having its forward face inclined so as to force said material upwardly and thereby prevent the formation of cavities in Ithe upper part of the core.

2. A core-molding machine, comprising a frame, a tube secured to said frame and open at its ends, a rod extending longitudinally within said tube, means for supplying core material to said tube, and a plunger longitudinally slidable within said tube and along said rod and adapted to force said material through said tube, said plunger having an aperture extending longitudinally through same and adapted to receive said rod, and having a second aperture separated from the other and adapted to permit the passage of a stiffening wire through said plunger longitudinally of the core.

3. In a core-molding machine, the combination of a frame, a tube secured to said frame, a hollow shank slidably mounted in lsaid frame in alinement with said tube, a

plunger secured to said shank, fitting said tube and longitudinally slidable therein, a rod secured to said frame and extending longitudinally through said shank and plunger andinto said tube a considerable distance beyond said plunger, means forsupplying core material to said tube, and means for causing said shank to reciprocate longitudinally of said tube and force said material through same.

. Signed at Chicago this Sth day of January, 1902.

.JAMES M. PYOTT, JR.

Witnesses:

EUGENE A. RUMMLER, WM. R. RUMMLEB. 

